arsenide

[ahr-suh-nahyd, -nid]
noun Chemistry.
a compound containing two elements of which arsenic is the negative one, as silver arsenide, Ag 3 As.

Origin:
1860–65; arsen- + -ide

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arsenide (ˈɑːsəˌnaɪd)
 
n
a compound in which arsenic is the most electronegative element

Collins English Dictionary - Complete & Unabridged 10th Edition
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arsenide

any member of a rare mineral group consisting of compounds of one or more metals with arsenic (As). The coordination of the metal is almost always octahedral or tetrahedral. In the former case, each metal ion occupies a position within an octahedron composed of six oppositely charged arsenic ions, whereas in the latter each of the metal ions is surrounded by six oppositely charged neighbours arranged tetrahedrally. Structurally the arsenides resemble the sulfides (e.g., galena, sphalerite, and argentite) and are frequently included in that mineral group (see sulfide)

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Researchers investigate why iron arsenide materials become superconducting at relatively high temperatures.
Similarly, adding nitrogen to a semiconductor such as gallium arsenide phosphide will also give a multi-band semiconductor.
One involved depositing gallium arsenide on a rigid surface, then peeling it off to make a flexible solar cell.
These molecules form a monolayer on a gallium-arsenide substrate with one of the sulfur ends binding to the gallium arsenide.
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